Results 1 to 10 of about 289,816 (297)
Active Galactic Nuclei with High-Resolution X-Ray Spectroscopy
, 2023 Invited review chapter for the book High-Resolution X-Ray Spectroscopy: Instrumentation, Data Analysis, and Science (Eds. C. Bambi and J. Jiang, Springer Singapore, expected in 2023).
Gallo, Luigi C. +2 more
openaire +2 more sources
A direct comparison of X-ray spectral models for tori in active galactic nuclei [PDF]
, 2015 Several X-ray spectral models for tori in active galactic nuclei (AGNs) are available to constrain the properties of tori; however, the accuracy of these models has not been verified.
Yuan Liu, Xiaobo Li
semanticscholar +1 more source
X-Ray Properties of Optically Variable Low-mass AGN Candidates
The Astrophysical Journal, 2023 We present an X-ray analysis of 14 nearby ( z < 0.044) active galactic nuclei (AGNs) in low-mass galaxies ( M _* ≲ 5 × 10 ^9 M _⊙ ) selected based on their optical variability.
Alexander Messick +3 more
doaj +1 more source
Radio sources in the Chandra Galactic Bulge Survey [PDF]
, 2012 We discuss radio sources in the Chandra Galactic Bulge Survey region. By cross-matching the X-ray sources in this field with the NRAO VLA Sky Survey archival data, we find 12 candidate matches.
Britt, Christopher B. T. +8 more
core +4 more sources
Simultaneous X-ray/optical/UV snapshots of active galactic nuclei from XMM–Newton: spectral energy distributions for the reverberation mapped sample [PDF]
, 2008 We employ contemporaneous optical, ultraviolet (UV) and X-ray observations from the XMM–Newton European Photon Imaging Camera (EPIC-pn) and Optical Monitor (OM) archives to present, for the first time, simultaneous spectral energy distributions (SEDs ...
R. Vasudevan, A. Fabian
semanticscholar +1 more source
Journal of the American Ceramic Society, EarlyView.Deformation mechanism of CeO2 nanocubes and their size dependence of the elastic strain. Abstract The deformation mechanism of CeO2 nanocubes has been studied at room temperature using in situ nanocompression experiments in an environmental transmission electron microscope. Different imaging conditions were used to identify the slip systems.
Rongrong Zhang +4 more
wiley +1 more source
The Astrophysical Journal LettersThe high-energy-peaked BL Lacertae objects (HBLs) are the main targets of the Imaging X-ray Polarimetry Explorer (IXPE) for investigating the mechanisms of radiation and particle acceleration in jets. In this Letter, we report the first IXPE observations
Xin-Ke Hu +7 more
doaj +1 more source
X-Ray Flares in the Long-term Light Curve of Low-luminosity Active Galactic Nucleus M81*
The Astrophysical Journal, 2023 Most active galactic nuclei at the center of the nearby galaxies have supermassive black holes accreting at sub-Eddington rates through hot accretion flows or radiatively inefficient accretion flows, which efficiently produce jets.
Gunjan Tomar, Nayantara Gupta
doaj +1 more source
A statistical relation between the X-ray spectral index and Eddington ratio of active galactic nuclei in deep surveys [PDF]
, 2013 We present an investigation into how well the properties of the accretion flow on to a supermassive black hole may be coupled to those of the overlying hot corona.
M. Brightman +35 more
semanticscholar +1 more source
Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.Abstract The Solar, Anomalous, and Magnetospheric Explorer (SAMPEX) mission launched in July 1992 was the first NASA “Small Explorer” project. It had the goal to show how space missions could be developed much more rapidly than had become the situation in the 1980s and 1990s.
D. N. Baker, G. M. Mason
wiley +1 more source